
A receptacle has a recess and a passageway. A ball extends upwardly for receiving thereon a hitch. The ball is secured with respect to a coupling plate. A projection is received within the recess. The projection has a passageway with a pin. A locking assembly has a fixed portion. The fixed portion has a sleeve. The sleeve is secured with respect to the coupling plate. A passageway extends through the coupling plate. A removable portion has a retaining bar. The removable portion has a portion ada...











